re PR middle-end/56461 (GCC is leaking lots of memory)

	PR middle-end/56461
	* tree-vect-stmts.c (vectorizable_shift): Don't call create methods
	on vec_oprnds0 or vec_oprnds1 before loop, only call it on
	vec_oprnds1 right before pushing anything to it for
	scalar_shift_arg.

From-SVN: r196425

gcc/ChangeLog

 2013-03-04  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/56461
+	* tree-vect-stmts.c (vectorizable_shift): Don't call create methods
+	on vec_oprnds0 or vec_oprnds1 before loop, only call it on
+	vec_oprnds1 right before pushing anything to it for
+	scalar_shift_arg.
+
+	PR middle-end/56461
 	* tree-vect-loop.c (destroy_loop_vec_info): For !clean_stmts, just
 	set nbbs to 0 instead of having separate code path.
 	(vect_analyze_loop_form): Call destroy_loop_vec_info with true
@@ -20,12 +26,13 @@
 
 	* config/microblaze/microblaze.c:
 	Check mcpu, pcmp requirement and set TARGET_REORDER to 0 if not met.
-	*  config/microblaze/microblaze.h: Add -mxl-reorder to DRIVER_SELF_SPECS
-	*  config/microblaze/microblaze.md: New bswapsi2 and bswaphi2
-	instructions emitted if TARGET_REORDER
+	* config/microblaze/microblaze.h: Add -mxl-reorder to
+	DRIVER_SELF_SPECS.
+	* config/microblaze/microblaze.md: New bswapsi2 and bswaphi2.
+	instructions emitted if TARGET_REORDER.
 	* config/microblaze/microblaze.opt: New option -mxl-reorder set to 1 
 	or 0 for -m/-mno case, but initialises as 2 to detect default use case 
-	separately
+	separately.
 
 2013-03-01  Xinliang David Li  <davidxl@google.com>
 

gcc/tree-vect-stmts.c

@@ -3335,21 +3335,6 @@ vectorizable_shift (gimple stmt, gimple_stmt_iterator *gsi,
   /* Handle def.  */
   vec_dest = vect_create_destination_var (scalar_dest, vectype);
 
-  /* Allocate VECs for vector operands.  In case of SLP, vector operands are
-     created in the previous stages of the recursion, so no allocation is
-     needed, except for the case of shift with scalar shift argument.  In that
-     case we store the scalar operand in VEC_OPRNDS1 for every vector stmt to
-     be created to vectorize the SLP group, i.e., SLP_NODE->VEC_STMTS_SIZE.
-     In case of loop-based vectorization we allocate VECs of size 1.  We
-     allocate VEC_OPRNDS1 only in case of binary operation.  */
-  if (!slp_node)
-    {
-      vec_oprnds0.create (1);
-      vec_oprnds1.create (1);
-    }
-  else if (scalar_shift_arg)
-    vec_oprnds1.create (slp_node->vec_stmts_size);
-
   prev_stmt_info = NULL;
   for (j = 0; j < ncopies; j++)
     {
@@ -3369,6 +3354,7 @@ vectorizable_shift (gimple stmt, gimple_stmt_iterator *gsi,
                     dump_printf_loc (MSG_NOTE, vect_location,
                                      "operand 1 using scalar mode.");
                   vec_oprnd1 = op1;
+                  vec_oprnds1.create (slp_node ? slp_node->vec_stmts_size : 1);
                   vec_oprnds1.quick_push (vec_oprnd1);
                   if (slp_node)
                     {